US2783266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nitriles
Assignee: California Research LLC
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Filing: 1953-05-19
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Granted: 1957-02-26
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Expires: 1973-05-19
Abstract
No abstract record available.
Inventors
- 👤 Jr William G Toland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:45
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR PRODUCING NITRILES WHICH COMPRISES HEATING A SUBSTANTIALLY ANHYDROUS MIXTURE OF SULFUR, AMMONIA AND A LOWER ALKYL BENZENE IN A CLOSED REACTION ZONE TO A TEMPERATURE IN THE RANGE FROM 400 TO 700* F. UNTIL A SUPERATMOSPHERIC HYDROGEN SULFIDE PRESSURE IS GENERATED IN THE REACTION ZONE, MAINTAINING THE REACTION PRODUCT MIXTURE AT APPROXIMATELY REACTION TEMPERATURE AND WITHDRAWING VAPORS FROM THE REACTION MIXTURE UNTIL THE EFFLUENT VAPORS ARE SUBSTANTIALLY FREE OF HYDROGEN SULFIDE.
Claim 2
Dependent Claim
74 words
A PROCESS FOR PRODUCING NITRILES WHICH COMPRISES HEATING A SUBSTANTIALLY ANHYDROUS MIXTURE OF SULFUR, AMMONIA AND A LOWER ALKYL BENZENE IN A CLOSED REACTION ZONE TO A TEMPERATURE IN THE RANGE FROM 400 TO 700* F. UNTIL A SUPERATMOSPHERIC HYDROGEN SULFIDE PRESSURE IS GENERATED IN THE REACTION ZONE, MAINTAINING THE REACTION PRODUCT MIXTURE AT APPROXIMATELY REACTION TEMPERATURE AND WITHDRAWING VAPORS FROM THE REACTION MIXTURE UNTIL THE EFFLUENT VAPORS ARE SUBSTANTIALLY FREE OF HYDROGEN SULFIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |